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[v2,06/12] board: stm32mp1: set environment variable fdtfile

Message ID 20200422142834.v2.6.If6131518ee15d3299da69d674674ec03978eb58b@changeid
State Superseded
Headers show
Series stm32mp1: several board and arch updates | expand

Commit Message

Patrick Delaunay April 22, 2020, 12:29 p.m. UTC 
For booting Linux in the generic distro mechanism and support of
FDTDIR in extlinux.conf , cmd/pxe.c retrieves the FDT file name
from "fdtfile" environment variable.

Dynamically build this variable with compatible of STMicroelectronics
boards.

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
Reviewed-by: Patrice Chotard <patrice.chotard at st.com>
---

Changes in v2: None

 board/st/stm32mp1/stm32mp1.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)
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Patch

diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c
index 8e247bbc87..280c5b7ae4 100644
--- a/board/st/stm32mp1/stm32mp1.c
+++ b/board/st/stm32mp1/stm32mp1.c
@@ -704,10 +704,19 @@  int board_late_init(void)
 	fdt_compat = fdt_getprop(gd->fdt_blob, 0, "compatible",
 				 &fdt_compat_len);
 	if (fdt_compat && fdt_compat_len) {
-		if (strncmp(fdt_compat, "st,", 3) != 0)
+		if (strncmp(fdt_compat, "st,", 3) != 0) {
 			env_set("board_name", fdt_compat);
-		else
+		} else {
+			char dtb_name[256];
+			int buf_len = sizeof(dtb_name);
+
 			env_set("board_name", fdt_compat + 3);
+
+			strncpy(dtb_name, fdt_compat + 3, buf_len);
+			buf_len -= strlen(fdt_compat + 3);
+			strncat(dtb_name, ".dtb", buf_len);
+			env_set("fdtfile", dtb_name);
+		}
 	}
 	ret = uclass_get_device_by_driver(UCLASS_MISC,
 					  DM_GET_DRIVER(stm32mp_bsec),